# US 11,439,748 B2 · Infusion device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,439,748 B2 - Document ID: US11439748B2 - Status: Granted - Kind: B2 - Application number: 16/657,089 - Filed: 2019-10-18 - Published: 2020-02-27 - Granted: 2022-09-13 - Earliest claimed: 2012-04-10 - Assignees: Shl Medical AG - Applicants: Shl Medical AG - Inventors: Lucio Giambattista; Antonio Bendek - Web page: https://patentgrep.com/patent/US11439748B2 ## CPC - A61M 5/1454: {spring-actuated, e.g. by a clockwork} - A61M 5/14566: {with a replaceable reservoir for receiving a piston rod of the pump} - A61M 5/158: Needles {for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body} - A61M 5/14248: {of the skin patch type} - A61M 5/1452: {pressurised by means of pistons} - A61M 2005/14252: {with needle insertion means} - A61M 2005/1583: {Needle extractors} - A61M 2005/1585: {Needle inserters} - A61M 2005/31518: {designed to reduce the overall size of an injection device, e.g. using flexible or pivotally connected chain-like rod members} - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract The present invention relates to an infusion device comprising a housing; a compartment inside said housing for positioning a medicament container, an infusion needle arranged to said housing, being connectable to said medicament container for delivering a dose of medicament, a piston plunger arranged in said housing capable of acting on said medicament container for delivering a dose of medicament, mechanical drive means capable of acting on said piston plunger for delivering a dose of medicament. The invention is characterised in that said piston plunger comprises a number of distinct segments being inter-connectable to each other for forming an elongated piston plunger. ## Claims ### Claim 1 A medicament delivery device, comprising: a housing; a cartridge retainer having a longitudinal axis located inside the housing; a needle having a starting stationary position where the needle is completely within the housing and being in fluid communication with a medicament container positioned within the cartridge retainer so that a dose of medicament is delivered through the needle, where the needle is movably arranged within the housing, where the needle has a proximal end that moves from the starting stationary position within the housing to a second position that is extended to a position outside the housing, and where the movement of the needle from the first position to the second position defines an axis of movement; and a piston plunger disposed within in the housing, where an end of the piston plunger extends within the medicament container during delivery of the dose of medicament, wherein the piston plunger moves parallel to the longitudinal axis of the cartridge retainer in a direction that is generally transverse to the axis of movement of the proximal end of the needle; wherein the proximal end of the needle moves to the second position before delivery of the dose of the medicament begins. ### Claim 2 (depends on 1) The medicament delivery device of claim 1 further comprising a tube fixed to a distal end of the needle, where the needle hub moves in a direction generally transverse to the movement of the piston plunger. ### Claim 3 (depends on 1) The medicament delivery device of claim 1 further comprising tubing that is in fluid communication with the needle and the medicament within the medicament container when positioned within the cartridge retainer. ### Claim 4 (depends on 1) The medicament delivery device of claim 1, where the needle when in the second position is locked relative to the housing to prevent movement in a distal direction. ### Claim 5 (depends on 1) The medicament delivery device of claim 1 further comprising a biasing member operatively associated with the housing to move the needle relative to the housing. ### Claim 6 (depends on 1) The medicament delivery device of claim 1 further comprises a driver operatively engaged with the piston plunger to move the piston plunger parallel to the longitudinal axis to deliver the dose of medicament. ### Claim 7 (depends on 6) The medicament delivery device of claim 6, further comprising an injection speed control mechanism operatively connected to the driver. ### Claim 8 (depends on 7) The medicament delivery device of claim 7, where the injection speed control mechanism comprises cogwheels. ### Claim 9 (depends on 1) The medicament delivery device of claim 1 further comprises an operation member that protrudes from the housing and is accessible to a user to activate the medical device. ### Claim 10 (depends on 1) The medicament delivery device of claim 1 wherein the housing comprises a proximal part and a distal part, where both the proximal and distal parts are rectangular shape. ### Claim 11 (depends on 1) The medicament delivery device of claim 1 wherein the proximal end of the needle is covered by a membrane when the needle is in the starting stationary position within the housing and the needle is in fluid communication with the medicament container prior to the needle moving relative to and exiting from the housing. ### Claim 12 (depends on 1) The medicament delivery device of claim 1 wherein a rotating gear drives the piston plunger to move parallel to the longitudinal axis of the cartridge retainer during medicament delivery. ### Claim 13 (depends on 1) The medicament delivery device of claim 1 wherein the piston plunger further comprises segments. ### Claim 14 (depends on 1) The medicament delivery device of claim 1 wherein a part of the housing is removable to allow user access to the cartridge retainer. ### Claim 15 (depends on 1) The medicament delivery device of claim 1 wherein axial movement of the piston plunger is driven by two or more rotating gears. ### Claim 16 (depends on 1) The medicament delivery device of claim 1 wherein the housing comprises a window to allow a user to monitor medicament delivery progress. ### Claim 17 (depends on 1) The medicament delivery device of claim 1 wherein the housing has a length at least equal to a length of the cartridge retainer as measured along the longitudinal axis. ### Claim 18 A medicament delivery device, comprising: a housing; a cartridge retainer having a longitudinal axis and located within the housing; an operation member that protrudes from the housing and is accessible to a user; a needle having a proximal end and having a starting stationary position where the needle is completely within the housing such that the needle is in fluid communication with a medicament container positioned in the cartridge retainer prior to the needle moving relative to and exiting from the housing so that a dose of medicament is delivered through the needle, where the proximal end of the needle moves from the starting stationary position within the housing to a second position that is extended to a position outside the housing and where the movement of the needle from the first position to the second position defines an axis of movement; a piston plunger disposed within in the housing, where an end of the piston plunger extends within the medicament container during delivery of the medicament, where the piston plunger moves parallel to the longitudinal axis of the cartridge retainer in a direction that is generally transverse to the axis of movement of the proximal end of the needle; and an injection speed control mechanism operatively controlling movement of the piston plunger, wherein the proximal end of the needle moves to the second position before delivery of the dose of the medicament begins. ### Claim 19 (depends on 18) The medicament delivery device of claim 18, where upon completion of the medicament delivery the needle moves distally from the second position to a third position where the needle is retracted to a position inside the housing to prevent unintentional needle sticks. ### Claim 20 (depends on 18) The medicament delivery device of claim 18 further comprising a window in the housing to allow a user to monitor medicament delivery progress.